Ventilation demonstrating model



Aug. 3 1926. 1,594,673

F. J. KREUTZER ET AL VERTILATIOI DBMOISTRATING MODEL Filed April 14, 1924 INVE TOR6 .BY A

Patented Aug. 3, 1926.

UNITED STATES PATENT OFFICE.

FREDERICK J. KREUTZER, OF ELMIRA, NEW YORK, AND JOHN B. OLSON, 015 FORT AT KINSON, WISCONSIN, ASSIGNORS TO JAMES MANUFACTURING COMPANY, OF FORT ATKINSON, WISCONSIN.

VENTILATION DEMONSTRATING MODEL.

Application filed April 14, 1924. Serial- No. 706,611.

This invention relates to improvements in models for demonstrating ventilators.

It isthe primary object of this invention to provide a novel and improved structure for demonstrating the path of air currents through a building structure. More particularly stated, it is the object of this invention to provide means for demonstrating how effectively air currents in a stable or the like may be controlled for ventilation purposes. v p

It is a further object of this invention to provide a simple and compact structure having a minimum of operating parts and adapted to illustrate effectively, and in the most natural manner, and by visual means the aths taken by air currents through a buil ing.

In the drawings:

Figure 1 is an elevation of a demonstrating model embodying this invention as such model would appear if the front face thereof were removed, substantially on the plane indicated at.1-1 in Figure 2.

Figure 2 is a detail section taken on line 2-2 of Figure 1.

Figure 3 is a section taken on line 33 of Figure 2.

Like parts are identified by the same ref- 3 erence characters throughout the several vlews.

The particular device which we have designed to embody this invention for the purpose of the present application illustrates a cross section through a barn having a stable therein and is intended to demonstrate the effectiveness of a particular system of stable ventilation. The model includes, therefore, side walls 5 and 6, a rear wall 7 having doors 8 and 8 therein; a front wall 8 having a window 9 extending completely across it to expose completely that portion of the in terior which repr sents the stable; a roof 10 and a minature barnventilator 11 mounted upon the roof in realistic manner.

The interior of the structure is divided into compartments by horizontal partitions 12 and 12' which are spaced apart to represent the ceiling and floor of the stable. The 1 loft compartment 13 of the model is not open to inspection since it is immaterial to the demonstration for which this particular device is designed. The lower portion or compartment 14 is likewise concealed. The

window 9 permits inspection of the stable 15 only.

In order that the demonstration maybe realistic, the interior of the stable is preferably fitted out with miniature stable equipment. For this purpose miniature stalls are built at 16 and 17, manger troughs being provided at 18, and gutters at 19. The par-- termediate the stalls to simulate the heat given off by the animals in the actual stable.

To this end a lamp 25 is introduced into the compartment 14 through door 8, and is preferably positioned immediately beneath the sheet metal panel 20.v The presence of the lamp is preferably not ascertainable from the front of the model, since it is desired to conceal and render inconspicuous the operating mechanism in order that the exhibit may be as realistic as possible.

In the present device the stable does not extend the full depth of the model, but terminates in a partition 26, forming a compartment 27 immediately behind the stable 15. Miniature ventilators 28 simulating those used in actual practice, depend from the ceiling of the stable and are connected by pipes 29 with compartment 27. The devices 28 comprise therein air inlet fittings.

Immediately above each of the troughs 19 are the foulairvents 30 leading upwardly from stable 15 to the cupola or ventilator 11 into which they discharge. Obviously the air in the stable, warmed by heat transmitted from plate 20, will rise and pass outwardly through the pipes 30 and the cupola 11. The heated air will be replaced by fresh airadmitted from the fittings 28 and a circulation will thereby be induced through the model stable in substantially the same manner in which real stables are actually ventilated.

Obviously, the heated air is not visible and in order to enable spectators to appreciate the paths taken by the air in passin through the stable, it is necessary to intro uce into the air a smoke or other finely divided substance which will move with the air and will be visible from the glass panel 9. For

this purpose an arrangement 1s made for producing the desired substance in chamber 27, or for there introducing it into the air. In this particular embodiment of our mvention, we have illustrated two glass bottles and 31 in compartment 27 such bottles being filled respectively with an acid and alkaline solution, such for example as sulphuric or hydrochloric acid in bottle 30 and ammonium hydroxide in bottle 31. The two bottles are corked with stoppers having apertures therethrough; a glass tube 32 passes through an aperture in each stopper and thereby affords communication between the interiors of the bottles. This tube preferably extends down below the level of the li uid in bottle 30, but does not extend below the liquid level in bottle 31. A short discharge tube 33 leads outwardly from the upper portion of bottle 30 and an air Inlet tube 34 extends through the stopper of bottle 31 to a point adjacent the bottom of said bottle. A bellows 35 is placed in the end of compartment 14 and is provided with an operating handle 36 projecting through the wall 5 of the model. The bellows 1s connected by a short length of hose 37 with the air inlet tube 34 which leads into bottle 31.

When the handle 36 is actuated to force air through interconnected bottles 31 and 30, said air will pick up ammonia in bottle 31 and will transfer. said ammonia to bottle 30 where an ammonium salt will "be formed Ammonium chloride and ammonium sulphate when formed in the above described manner each comprise a finely dividedmass of particles which will be buoyed up by the air currents and will have the appearance of smoke.

Thus, when the lamp 25 is in operation, the,

through the fittings 28 from the air enterin smoke-filled compartment 27 will be laden with smoke and its progress through the stable will be thereby made readily visible to an observer looking through the glass panel or window 9. The path which the air will take through the stable need not be particularl described herein, since such path will epend quite 'largely on a the particular type of ventilating apparatus employed and on the relative locations of the inlets and outlets. In fact, the position of the inlets and outlets as indicated in the accompanying drawings have been found to be very important in contributin to the successful operation ofthis particular type of ventilating system in the model.

Ultimately the smoke-laden air will pass upwardly through ducts 30 and out through the ventilator on the roof. The arrangement illustrated of bottles 30 and 31 is such that the materials in said bottles will commingle only when the bellows 35 is operated. Consequently, the arrangement is such as to conserve these materials and to make it possible for the operator to give a demonstration whenever desired. A single reciprod cation in operating handle 36 will produce a considerable quantity of smoke, suflicient to permit the device to operate for a sufiicient length of time for the ordinary demonstrathe device to ren er conspicuous the means by which the demonstration is performed, and the resulting appearance is very realistic. I

It will, of course, be understood that where we have used the word smoke in the foregoing description, we have intended to refer generically to any impalpable powder as well as to actual smoke, the sole consideration being the provision of some substance susceptible of being borne by the air currents and sufliciently tangible in its nature to permit the course of said currents to be visible to spectators We claim:

1. In a device of the character described, a structure providing a substantially closed compartment having a transparent inspection wall and inlet and outlet ports, me-

chanical means for inducing air flow through said compartment between said ports, a heater arranged to raise the temperature of a' restricted area in said compartment whereby will take a predetermined path with respect to said walled area, and a smoke producing device interposed between said mechanical means for inducing air flow to the inlet and said compartment and arranged to deliver smoke to air enterin said compartment whereby to render visi le the path of such air therethrough. j

2. In a device of the character described the combination of a structure providing a substantially closed compartment having a transparent ins ection wall and-inlet and outlet ports a eater arranged to warm a certain ortlon of the floor of said compartment. wliereby to control the course of air currents between said inlet and outlet ports, a chemical smoke producing device communicating with said 1nlet ports including separate bottles containing chemicals adapted for interaction, to ether with a mechanical air 'impelling mec anism operativ'ely communicating with one of said bottles and arranged to deliver air through said bottles successively to said inlet ports whereby said air will pick u from each of said bottles a charge of the chemicals therein and will deliver the smoke produced by interaction of said chemicals to said compartment and render visible the path of air flow between said orts. P 3. In a device of the character described, the combination with a structure built to represent the shape of a barn, of transversely extending walls dividing the space in said structure'into compartments, a winow exposing to view the interior of one of said compartments, the other compartment air flow therethrough tion. Consequentlv, there is very little about being concealed, a vertically extending partition wall forming the rear of the compartment exposed to view by means of said window and defining a rear compartment therebehind, ventilating pipes leading from said rear compartment "to said exposed compartment and terminating in the ceiling of said exposed compartment, ventilating exhaust pipes leading from the ceiling of said exposed compartment to the top of said structure, and smoke producing e uipment in said rear compartment adapte t supply smoke to the air passing through said ventilating ducts to said exposed compartment,

stable equipment in said exposed compart ment comprising opposed stalls and an intermediate passageway having a non-combustible floor, and means concealed beneath said floor in said structure for heating said floor, whereby to simulate the influences causing air circulation in a stable.

4. In a device of the character described,

a structurerepresenting a cross section of a barn and provided with horizontal partitions defining a stable therein, said structure having a glass wall between such partitions, whereby to render visible the interior of said stable, gutters in the floor of said stable, outlet pipes communicating with said stable compartment above said gutters and leading upwardly to the top of saidistruc: ture, a chamber separated from said stable, inlet pipes affording communication between said chamber and portions of said stable remote from said outlet pipes, ves sels in said chamber containin chemicals adapted for interaction to pro uce smoke, and means for heating the floor of said stable intermediate said'gutters, whereby to induce air circulation through said stable compartment.

F. J. KREUTZER. JOHN B, OLSON. 

